@article{CRMATH_2003__337_3_171_0,
     author = {Bonfiglioli, Andrea and Uguzzoni, Francesco},
     title = {Editorial note to: {{\textquotedblleft}Some} non-existence results for critical equations on~step-two stratified groups{\textquotedblright}},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {171},
     publisher = {Elsevier},
     volume = {337},
     number = {3},
     year = {2003},
     doi = {10.1016/S1631-073X(03)00315-7},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1016/S1631-073X(03)00315-7/}
}